Accession Number : AD0428230


Title :   A STUDY OF THE RADIATION SHIELDING CHARACTERISTICS OF BASIC CONCRETE STRUCTURES AT THE TOWER SHIELDING FACILITY


Corporate Author : OAK RIDGE NATIONAL LAB TN


Personal Author(s) : Cain, V R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/428230.pdf


Report Date : 24 Jan 1964


Pagination or Media Count : 73


Abstract : A series of experiments were performed to investigate the protection afforded by various typical structures against prompt weapons radiation. Radiation-intensity measurements were made at the Tower Shielding Facility in two concrete-shielded bunkers and in an interconnecting tunnel. Prompt weapons radiation was simulated by the Tower Shielding Reactor II (TSR-II), which was operated 100 ft above the ground. The distance between the reactor and the bunkers was approximately 700 ft. The bunkers were each 12-ft cubes and were constructed so that the shield thickness on the front face of one and on the top face of the other could be varied in 4-in. steps from 0 to 20 in. The thickness of concrete and dirt surrounding all other faces was sufficient to make them black to incident radiation. The gamma-ray and fast-neutron dose rates and thermal-neutron fluxes measured at various positions within the bunkers and in the tunnel and the pulse-height spectra from a 3-in. sodium iodide crystal determined at one position in the top bunker and one position in the tunnel are reported.


Descriptors :   *CONCRETE , *RADIATION SHIELDING , *RADIATION WEAPONS , SIMULATION , THICKNESS , CIVIL DEFENSE , SHELTERS , GAMMA RAYS , INSTRUMENTATION , NUCLEAR REACTORS , DOSE RATE , FAST NEUTRONS , NEUTRON FLUX , THERMAL NEUTRONS


Subject Categories : Nuclear Radiation Shield, Protection & Safety


Distribution Statement : APPROVED FOR PUBLIC RELEASE